if one has oppo 105 , the disc will sound better than the ripped file playback to the same oppo DAC (usb input )
This is the exact opposite in my system. Ripped files sound amazingly good than the same played as discs through the Oppo UDP 205. I think a better transport would make a difference when discs are used.
optical disk playback on old internal DAC vs ripped file on new external DAC
BTW, my comparison is between the discs played on the Oppo Vs files streamed through my audio server using the same DAC (Oppo's internal DAC)